Order DIGENEA

Question 1

Characteristics of Family FASCIOLIDAE

Answer 1

• Large, leaf‐like flukes
• Usually affects herbivores
• Spiny cuticle and suckers are held close together (distome)
• Absent receptaculum seminis
• Ovary, testes, and vitellaria are highly branched
• Pharynx and short esophagus are present
• Ceca may be branched or simple
• Parasitic in the liver, bile ducts, and sometimes in the small intestine

Question 2

Genera of Fasciolidae

Answer 2

Fasciola
Fascioloides
Fasciolopsis

Question 3

Characteristics of Fasciola “Liver flukes”

Answer 3

• most important genus of the Class Trematoda in domestic animals.
• Anterior end forms a cone shaped projection with shoulders
• most important flukes of ruminants
• commonly known as Liver fluke
• cause a condition known as fasciolosis,”liver rot “ or “liver fluke dss”
• occurs either singly or mixec infections
• the incidence fasciolosis (regardless of species)

Question 4

Final Host of Fasciola hepatica

Answer 4

Ruminants, pig, hare, rabbit, horse, dog, cat, man, elephant, kangaroo

Question 5

I. H. Of Fasciola hepatica in temperate

Answer 5

Lymnaea truncatula

Question 6

I. H. Of Fasciola hepatica in the Phil.

Answer 6

Lymnaea auricularia rubigunosa
Lymnaea Philippinensis or Lymnaea viridis

Question 7

Predilection site of Fasciola hepatica

Answer 7

Adults - bile duct
Immature - liver parenchyma
Abberant flukes - lungs

Question 8

Fasciola hepatica in Europe

Answer 8

Lymnaea truncatula

Question 9

Fasciola hepatica in Australia, New Zealand

Answer 9

Lymnaea tomentosa; Lymnaea columella

Question 10

Fasciola hepatica in South America

Answer 10

Lymnaea viator; Lymnaea cubensis

Question 11

Fasciola hepatica in New Guinea; China

Answer 11

Lymnaea viridis

Question 12

Fasciola gigantica in Africa

Answer 12

Lymnaea auricularia

Question 13

Fasciola gigantica in Middle east

Answer 13

Lymnaea lagotis euphratica

Question 14

Fasciola gigantica in India

Answer 14

Lymnaea auricularia rufescens

Question 15

Fasciola gigantica in Southeast asia

Answer 15

Lymnaea auricularia rubigunosa

Question 16

Fasciola gigantica in China, Indochina, Philippines

Answer 16

Lymnaea auricularia suinhoei

Question 17

Fasciola gigantica in China, Hawaii, Japan

Answer 17

Lymnaea viridis

Question 18

Drug of choice in fasciola

Answer 18

Triclabendazole

Question 19

“large American liver fluke”

Answer 19

Fascioloides

Question 20

Characteristics of Fascioloides

Answer 20

• large (2-10cm), oval, thick flesh-colored fluke
• No distinct anterior cone

Question 21

Final Host of Fascioloides magna

Answer 21

White-tailed deer

Question 22

Intermediate host of Fascioloides magna

Answer 22

Lymnaea sp.
Fossaria sp.
Siahnocola sp.

Question 23

Site of Fascioloides magna

Answer 23

Liver tissue and/ or bile duct

Question 24

Characteristics of Fasciolopsis

Answer 24

• Life cycle similar with fasciola
• infection acquired by ingestio of encysted MC in tubers of water plants like water Chestnut (Eliocharis tuberosa) which are eaten raw by animals
• Large (3-7 cm)
• 9-13 wks prepaent period

Question 25

Final host of Fasciolopsis buski

Answer 25

Man
Pigs

Question 26

Intermediate Host of Fasciolopsis buski

Answer 26

Planorbis sp.
Segmentina sp.

Question 27

Predilection site of Fasciolopsis buski

Answer 27

Small intestine